How long doesPowdered milklast in the pantry once opened?
What opening the package actually costs
Opening the package is the decision that settles this page. Sealed, the item holds 5 years in the pantry; once open it holds 3 months open in the pantry, the same food measured in months instead of years, a drop of 20 times.
Every storage figure the USDA publishes for this item
The USDA rates this item in the pantry and nowhere else, one of 84 foods of the 466 it files that way.
- In the pantry3 years to 5 years
- Once opened · in the pantry3 months
What the USDA adds in words
The USDA attaches 1 handling note to this item, reproduced below word for word. It is not a storage time: it qualifies the figure above rather than replacing it. These are the source's own sentences, not ours, and they are the part of the FoodKeeper record that a table of durations cannot carry.
In the pantry. 3 - 5 year timetable based on cool temperatures, dark storage. May spoil as quickly as 3 months in hot temperatures.
Turning the range into a date
Two clocks run on this item: one from the day it went into storage and one from the day the seal broke. Both are listed below, 2 rows in all.
- In the pantryUse by3 years to 5 years after the day you stored it
- Once opened · in the pantryUse by3 months after the day you opened it
Is this window about safety or about taste?
The answer at the top of this page reads 3 months in the pantry once opened. The USDA rating this place at all is the USDA saying Powdered milk keeps there, so the figure rates how good it will be. Past it, judge it by look and smell: this window rates how good the food will be, not the day it becomes a hazard.
Every figure assumes the food was sound when you stored it, that your refrigerator holds 40 °F or below and your freezer 0 °F or below, and that the package was handled normally.
It is past the date. Now what?
Say the calculator above puts Powdered milk past its 3 months in the pantry once opened window. Past that the calendar stops deciding and the food itself does. Mold, a slimy or sticky surface, soft or darkened spots, or a sour smell mean it goes out whatever the date says.
The FoodKeeper entry this page is built from prints storage times and nothing else, so anything past them here is USDA and FSIS guidance rather than a figure from the source. The whole rule, including the cases the source does not cover, is set out under what to do when the date has passed.
Is that a long time?
Nothing the USDA files under Dairy Products & Eggs keeps longer outside the freezer than this item: 5 years. Next is Nacho cheese, store bought at 2 years, and the middle of the 29-item list sits at 2 weeks.
Items that behave the same way
Every one of the 6 nearest items keeps the same or less, 2 months to 2 years against the 5 years of this item, which makes it the durable end of the cluster.
- Nacho cheese, store boughtkeeps 2 weeks in the fridge once openedup to 2 years sealed in the pantry
- Gheekeeps 1 year in the fridge
- Margarinekeeps 6 months sealed in the fridge
- String Cheesekeeps 5 months sealed in the fridge
- Vegan Cheddar Cheesekeeps 3 days in the fridge once openedup to 4 months sealed in the fridge
- Butterkeeps 1 month sealed in the fridge
Products the USDA rates in the same places
6 other products are rated in exactly these places — pantry and pantry after opening — out of the 466 in the file, so this is an uncommon shape of record. The nearest of them by keeping time are Almond extract, Cinnamon extract and Lemon extract. They are listed below with their own answers, closest first, which is why this list differs from the one on their pages. Of the ones shown, none keeps longer than this one does. The longest-keeping of them is Almond extract at 2 years.
- Almond extract12 months in the pantry once openedup to 2 years in the pantry
- Cinnamon extract12 months in the pantry once openedup to 2 years in the pantry
- Lemon extract12 months in the pantry once openedup to 2 years in the pantry
- Pure vanilla extract12 months in the pantry once openedup to 2 years in the pantry
- Butter flavor12 months in the pantry once openedup to 2 years in the pantry
- Coconut flavor12 months in the pantry once openedup to 2 years in the pantry
Closest by shape, but not an exact match — they share most of these places, not all of them.
- Ghee1 year in the fridge
- Coffee creamer3 weeks sealed in the fridgeliquid refrigerated
The rest of the Dairy Products & Eggs shelf
Nothing else on the Dairy Products & Eggs shelf keeps longer outside the freezer than this one. The other 28 products there run down from Nacho cheese at 2 years to Pudding at 2 days, and the ones nearest this product by window are Nacho cheese, Ghee and Margarine. That makes this page the top of its own shelf rather than a middle entry. Across the whole of Dairy Products & Eggs the same product ranks 1 of 29. The middle of the shelf is Whipped topping, at 2 weeks.
- Nacho cheese2 years2 weeks in the fridge once opened
- Ghee2 years1 year in the fridge
- Margarine6 months6 months sealed in the fridge
- String Cheese5 months5 months sealed in the fridge
- Vegan Cheddar Cheese4 months3 days in the fridge once opened
- Butter2 months1 month sealed in the fridge
- Eggs5 weeks3 weeks sealed in the fridge
- Whipped cream4 weeks3 weeks sealed in the fridge
If it has to keep longer than this
Nothing the USDA files under Dairy Products & Eggs keeps at least twice as long as this one outside the freezer. It runs the other way: 28 entries in the category keep half as long or less, among them Nacho cheese, Ghee and Margarine. So the question this page answers is not what to buy instead, but what this product outlasts on the same shelf, and by how much. Twice as long is the cutoff used here, so a product a few days apart from this one is not treated as a step.
- Nacho cheese2 years2 weeks in the fridge once opened
- Ghee2 years1 year in the fridge
- Margarine6 months6 months sealed in the fridge
- String Cheese5 months5 months sealed in the fridge
- Vegan Cheddar Cheese4 months3 days in the fridge once opened
- Butter2 months1 month sealed in the fridge
- Eggs5 weeks3 weeks sealed in the fridge
- Whipped cream4 weeks3 weeks sealed in the fridge
The record this page is built from
This page is built from a single FoodKeeper row, record 465 — the source’s own number for it, not a position — one of the 661 rows in the snapshot. That row fills 2 of the nine storage slots with a time, and the binding figure on it is printed by the source in years, which is the unit this page keeps rather than converting it to days. The record carries 1 handling note, quoted on this page word for word. Every figure here comes from one fixed snapshot, USDA FoodKeeper, retrieved 1 September 2026, and is not refreshed page by page.
Where these numbers come from
Every range on this page is published by the USDA FoodKeeper and reproduced unchanged. The multipliers, the rankings, the percentages and the dates are ours, computed from those ranges. Where the source gives a span such as 3 to 5 weeks, comparisons use the upper figure, and the full span is always printed.
Rankings cover only the items the USDA gives a usable figure for, and identical ranges share a place rather than being ordered arbitrarily. Neighbors are chosen by nearest storage time within the same category, never alphabetically: two foods filed next to each other by name usually have nothing to do with each other. The freezer is excluded from ranking because it flattens almost everything.
Where the USDA lists several kinds under one name, they share one page here and every kind keeps its own windows: the source prints them as separate rows, and a page that merged them would be inventing a figure the source never published. Comparisons and the place in the category are computed for the kind the plain name means — the shell egg for eggs, the can for tuna — which is settled name by name rather than by the order the source lists its rows in, and the page names it. Where the plain name means no single kind, the page prints no single figure at all and lists the kinds instead.
Source: USDA FoodKeeper, retrieved 1 September 2026. This site computes every comparison on this page and takes responsibility for it. Found a figure that does not match the source? Tell us on the contact page, with the page and the row — the parsing is mechanical, so a mismatch is our bug and we want it. How the whole site is built, which figures are ours and where the source can be checked is on the method page.
USDA index terms: milk, powder, Powdered
KeepsUntil is an independent reference built on public USDA data. It is not affiliated with, endorsed by, or connected to the U.S. Department of Agriculture or the Food and Drug Administration. Whether a given window is a safety limit or a quality window is stated on the page that prints it.